15872971 has 2 divisors, whose sum is σ = 15872972. Its totient is φ = 15872970.

The previous prime is 15872953. The next prime is 15873001. The reversal of 15872971 is 17927851.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 15872971 - 2⁹ = 15872459 is a prime.

It is not a weakly prime, because it can be changed into another prime (15870971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7936485 + 7936486.

It is an arithmetic number, because the mean of its divisors is an integer number (7936486).

Almost surely, 2^15872971 is an apocalyptic number.

15872971 is a deficient number, since it is larger than the sum of its proper divisors (1).

15872971 is an equidigital number, since it uses as much as digits as its factorization.

15872971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35280, while the sum is 40.

The square root of 15872971 is about 3984.0897329252. The cubic root of 15872971 is about 251.3155768862.

The spelling of 15872971 in words is "fifteen million, eight hundred seventy-two thousand, nine hundred seventy-one".